Hydraulic motor



April 15, 1941. J MCQUADE 2,238,424

HYDRAULIC MOTOR Filed Nov. 25, 1938 2' Sheets-Sheet 1 April 15, 1941. MCQUADE 2,238,424 I HYDRAULIC MOTOR Filed Nov. 25, 1958 2 Sheets-Sheet 2 awe/WM Jfoberf c1 11 Quade,

Patented Apr. 15, 1941 UNITED STATES PATENT' OFFICE maamc Moron Robert I. We. Chicago, 111.

(8:91;; No. mass This invention relates to improvements in hydraulic motors for sleeve presses, particularly adapted for use in applying and removing cylinder and valve bushings of locomotive steam engines.

The primary object of the present invention is to provide an improved press of the above kind which is extremely simple, compact and durable in construction.

Another object of the present invention is to provide a press of the above kind which will operate efliciently and may be readily placed into use, as well as readly removed and transported from one place of use to another.

The present invention consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

Figure 1.

Figure 4 is a fragmentary section taken on the plane of line 4-4 of Figure 3.

Figure 5 illustratesthe press of Figure 1 in use for applying valve bushings of a locomotive steam engine, the valve chest and associated parts of the engine being shown in longitudinal section; and

Figure 6 is a view similar to Figure 5 illustrating use of the present press in applying a cylinder bushing.

Referring in detail to the drawings, the present hydraulic press comprises heads A and B connected at corresponding ends by cylinders 5 and 50 having pistons 6 and 6a. movable therein. The head A is in the nature of a relatively thick flat elongated. plate to which the adjacent ends of the cylinders 5 and 5a are welded so as to provide a connecting fillet I at the joints between the cylinders and the head A in surrounding relation to the adjacent ends of said cylinders. The head 13 consists of a relatively thinner flat elongated plate I having openings snugly receiving the opposite ends of the cylinders 5 and 5a and! welded to the latter, and closure plates 9 removably bolted to the plate 8 as at I. and having central thicker portions H fltting slightly within the adjacent ends oi the cylinders as shown clearly in Figure 1. The head A has transverse passages l2 and Ho leading from points centrally of and communicating with the cylinders I and 5a to and through one longitudinal edge 01' said head A. These passages are connected by a manifold II with a pipe ll extending from a suitable source at supply for fluid under pressure, whereby such fluid under pressure may be simultaneously introduced into corresponding ends of the cylinders I and id for actuation of the pistons I and 6a under like pressure.

The pistons 6 and 8a are carried by piston rods [5 and lie that slidably project through central openings in the cover plates 9 and 8a, and the projecting outer end portions of piston rods l5 and Ilia have terminal portions l6 and I of reduced size fitted within end openings of a cross bar I! and secured therein by set screws 18 or the like. I

The headA and the plate member 8 of head B are provided intermediate their ends with openings at I! and I which are alined and through which slidably extends a longitudinally disposed pull rod 20 that also extends through the cross bar I! intermediate the ends of the latter and has a nut 2| threaded on the end thereof at the outer side of said cross bar l1. It will be noted that the cylinders 5 and 5a are arranged comparatively close together so as to leave very little clearance between the same and opposite sides of the pull rod- 20. This produces a very compact and efficient arrangement, and in order to provide proper clearance for the pull rod 20, the closure plates 9 and 9a are provided in their adjacent sides with arcuate recesses 22 and 22a conforming to the rod.- 20. In this way, the walls of the opening Na in plate member 8 and the walls of the slots 22 and 22a in the closure plates 9 and 90 provide relatively wide slide bearing surfaces for the rod 20 in the head B. At the same time, the closure plates Qand 9a are separate for individual removal and access to the respective cylinders.

As shown in Figures 5 and 6, the pipe I may be connected with the source of fluid under presv sure by means of a flexible hose 23, and may be provided with a branch 24 through which the elements are generally common in hydraulic.

presses and form no specific part of the present invention.

As illustrated in Figure 5, one of the many uses of the present press is to simultaneously apply bushings 21 and 21a within the opposite ends of the valve chest 28 of a locomotive steam engine. In making use of the invention for this purpose, the pull rod 20 is extended through the chest 28 and is provided on its outer end with an abutment member 29 arranged to engage the outer end of the bushing 21a. In this use, the pull rod 20 is preferably reversed so that it freely extends through the cross bar I1 and the nut 2| is threaded on the end of rod 20 so as to be disposed against the head A. A pipe or tube 3|] loosely surrounds the rod 20 between the cross bar l1 and a. second abutment member 3| through which the rod 20 loosely extends and which is disposed to engage the outer end of the bushing 21. When fluid under pressure is introduced in the cylinders 5 and 5a, the pistons 6 and 6a are forced outwardly and the cylinders 5 and 5a are forced in the opposite direction, or respectively to the right and left of Figure 5. This causes a pull to be exerted on the rod 20 to force the bushing 21a into place, while a pushing force is simultaneously applied against the abutment member 3| through the medium of cross bar I! and pipe 30 so as to force the bushing 21 into place. When the bushings have been finally applied in this way, the nut 32 threaded on the outer end of rod: 20 to hold the abutment member 29 in place, is removed so as to permit removal of the abutment member 29 and thereby allow the press to be dismounted for transportation to another point of use.

As shown in Figure 6, the present press may, among manyother uses, also be used for applying a bushing 33 to the cylinder 34 of a locomotive steam engine. In this use, the assembly of the press with respect to the pull rod 20 remains the same as shown in Figure 1, and the head A is arranged or disposed to directly abut an abutment member 35 engaging one end of the cylinder 34 and through which the pull rod 20 slidably extends. The pull rod 20 extends axially through the cylinder 34 and has an abutment member 36 secured on the outer end thereof by means of the nut 32. Abutment member 36 engages the outer end of the cylinder bushing 33, and when fluid under pressure is supplied to the cylinders 5 and 5a, the piston rods l5 and Ilia are forced outwardly so as to move the cross bar I! therewith and exert a pull upon the rod 20. This pull is transmitted to the abutment member 36 which in turn forces the bushing 33 into the cylinder or toward the press proper. plied, the nut 32 may be removed to permit removal of the abutment member 36 so that the press may be dismounted and transported to another place of use. In both illustrated uses, the press is bodily applied to and supported by the work so that no separate or additional press support is required. The present press has been extensively employed in locomotive work for the illustrated and analogous uses, and has been found to have a long period of usefulness with- When the bushing 33 has thus been apinders out getting out of order, in addition to operating efliciently and expeditiously.

What I claim as new is:

1. In a hydraulic motor, heads comprising flat plates arranged in spaced parallel relation, a pair of cylinders respectively connecting corresponding ends of said heads and closed at opposite ends by the latter, one of said heads comprising a relatively thick plate having transverse fluid admission and exhaust passages leading through an edge thereof to the respective cylinders, a welded joint between said one head and the adjacent ends of said cylinders including a fillet surrounding each cylinder, pistons reciprocable in said cylinders and having rods slidably projecting through the other head, a cross bar having end openings, the outer terminals'of the piston rods being reduced and fitted in said openings of the cross bar, a pull rod arranged parallel with and between said cylinders and slidably extending through said heads, an end of said pull rod extending through the intermediate portion of the cross bar, a nut on the said end of the pull rod engaging the outer side of the cross bar to retain the pull rod therein, said other head comprising a thin plate having apertures receiving the other ends of the cylinders and welded to the latter, and separate closure plates for said other ends of the cylinders bolted to the outer face of said other head, said closure Plates being provided in their adjacent sides with. arcuate recesses conforming to said pull rod.

2. In a hydraulic motor, plate-like heads arranged in spaced parallel relation, a pair of cylrespectively connecting corresponding ends of said heads and closed at opposite ends by the latter, one of said heads comprising a relatively thick plate having transverse fluid admission and exhaust passages leading through an edge thereof to the respective cylinders, a welded joint between said one head and the adjacent ends of said cylinders including a flllet surrounding each cylinder, pistons reciprocable in said cylinders and having rods slidably projecting through the other head, a cross bar having end openings, the outer terminals of the piston rods being reduced and fitted in said openings of the cross bar, a pull rod arranged parallel with and between said cylinder and slidably extending through said heads, an end of said pull rod extending through the intermediate portion of the cross bar, means engaging the outer side of the cross bar to retain the pull rod therein, said other head comprising a thin plate having apertures receiving the other ends of the cylinders and welded to the latter, closure plates for said other ends of the cylinders bolted to said last-named plates, said cylinders and pull rod being in closely adjacent relation, and the adjacent sides of said closure plates having arcuate recesses so as to partially embrace the pull rod and afford increased slide bearing surface for the latter.

ROBERT J. McQUADE. 

